A tuning fork of unknown frequency gives 4beats/sec with a tuning fork of freq. 310Hz.It gives the same no. of beats/sec on filing.find unknown freq.

Question

A tuning fork of unknown frequency gives 4 beats/sec with a tuning fork of frequency 310Hz.It gives the same no. of beats/sec on filing.find the unknown frequency.

Comments

Its not timing its tuning

Answer 1

Let the unknown frequency be f.

So, before filling f – 310 = 4 Hz => f = 314 Hz

And, after filling, 310 – f = 4 Hz => f = 306 Hz

Thus, the required frequency is 314 Hz.